Quoting Reco (2019-08-08 17:25:02) > Hi. > > On Thu, Aug 08, 2019 at 04:54:17PM +0200, Jonas Smedegaard wrote: > > > > > Then Intel stopped making desktop boards and I wanted ZFS. ZFS > > > > > wants ECC memory. It was time to migrate to server hardware. > > > > > > > > My understanding is that ZFS's need / desire for ECC is > > > > something of a myth. It's certainly true that many ZFS / FreeNAS > > > > *users* have such a need, but the filesystem itself apparently > > > > doesn't: > > > > > > > > https://jrs-s.net/2015/02/03/will-zfs-and-non-ecc-ram-kill-your-data/ > > > > > > To summarize: if you're running ZFS, it can protect you from lots > > > of sources of data corruption. It can't protect you from RAM > > > errors without ECC, so you should opt for ECC if integrity is your > > > goal. > > > > > > None of the other filesystems protect you against RAM errors > > > either, so this is not a special requirement of ZFS. > > > > ECC memory is rare among ARM SBCs, but Helios4 uses ECC memory! > > ... with the only problem being the quantity of such RAM. > > A typical Helios4 board has whopping 2Gb of RAM, which is about 4 > times lower than needed for comfortable ZFS usage (assuming that zpool > size is measured in terabytes) and a user intends to run something > more than a OS kernel and sshd. That estimation deliberately excludes > all advanced ZFS features (such as compression, encryption and > deduplication). > > IMO for such RAM sizes it's better to use old trusted MDRAID, LVM, > ext4 and a new kid on the block - dm-integrity (all the needed tools > are in buster, but some assembly is required).
For the record I did not recommend using ZFS on low-end hardware. The OP asked for advice in buying low-end ARM-based hardware for use as server, and I pointed out that one ARM SBC (likely the only relatively cheap one) is known to use ECC memory - which (as the previous poster pointed out) is interesting _independently_ of choice of filesystem. Personally I use ext4 with journaling enabled, on either conventional rotating disks, SSDs, or sdcards (no RAID involved). - Jonas -- * Jonas Smedegaard - idealist & Internet-arkitekt * Tlf.: +45 40843136 Website: http://dr.jones.dk/ [x] quote me freely [ ] ask before reusing [ ] keep private
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